ashley

Ashley is a chemical engineer and skincare formulation specialist focused on creating science based, practical guides for indie beauty founders. She teaches formulation with clarity, accuracy, and a beginner friendly approach.

Stacked solid shampoo bars with natural colors – eco-friendly, waterless haircare concept.

How to Formulate Solid Shampoo Bars: A Beginner’s Guide to Surfactants & Oils

Learn the fundamentals of formulating solid shampoo bars — from understanding surfactants and oils to avoiding beginner mistakes. This guide gives you a science-backed introduction to creating bars that cleanse, condition, and perform. Ready to go beyond DIY recipes? This post will show you how to start formulating like a pro.

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